Quick Start Guide: Bridge-Mono Wiring - Crown I-T4000 Operation Manual

I-Tech Series Power Amplifiers
Quick-Start Guide: Bridge-Mono Wiring
Let's assume that you unpacked and installed your amplifier with the proper cooling. If not,
see Section 2 in this manual. We'll also assume that you will operate the amplifier in Bridge-
Mono. Basically you will turn on the amp, enable Bridge-Mono mode with the LCD Control
Screen, turn off the amp, wire it, and turn it back on.
1.
Be sure that no cables are connected to the amplifier. Plug the amplifier power cord into
the amplifier, then into an AC outlet.
2.
Turn on the amplifier power switch on the front panel. The LCD Control Screen will light
up (Figure A.4).
3.
Under the LCD Control Screen, press the Menu/Exit button. Press the Next button until
you see Output Mode on the screen.
4.
Press either Encoder knob to select BRIDGE MONO. Press and hold the knob to confirm
your choice. Press the Menu/Exit button.
5.
IMPORTANT: Turn off the amplifier. Unplug its power cord from the AC out-
let. The amplifier must be grounded when plugged into AC power.
6.
See Figure A.5. Connect a cable from your mixer output to the amplifier's Channel-1 XLR
input connector.
7.
Using Class 1 wiring, connect the speaker cable either to the amplifier's top Speakon
connector (terminals 1+ and 2+, Figure A.6) or across the red binding posts of both channels
(Figure A.5). Do not use the black binding posts in bridge-mono mode.
8.
Turn down your mixer master faders. Plug the power cord into the amplifier and then into
an AC outlet. Turn on the front-panel power switch. The LCD Control Screen will light up
(Figure A.3).
9.
Using both Encoder knobs (Level controls), set Attenuation to 0 dB. Press the Menu/
Exit button, then the Next button, to access CH1 Sensitivity. Turn an Encoder knob fully
down (CCW) until the minimum dB gain is displayed. See Appendix B for details.
10.
Play a program through your mixer. Set its level to peak at 0 dB or 0 VU maximum on
the mixer meters. Gradually turn up (CW) the left Encoder knob (Level control) to the desired
volume for CH1. Press Exit when done.
Note: If the SPL is too high at the beginning of Step 10, press Menu/Exit, then press Next
until you see ADVANCED MENU. Push an Encoder knob. Press Next until you see MAXI-
MUM ANALOG INPUT. Press an Encoder knob so the display reads 21 dBu. Press Menu/
Exit twice. Press Next. CH1 Sensitivity will be displayed. Gradually turn up (CW) the left
Encoder knob to the desired volume for CH1. Press Exit when done.
Operation Manual
Figure A.5 Rear Panel Connections
for Bridge-Mono Wiring
CAUTION – SHOCK HAZ-
ARD: Potentially lethal
The LCD Control Screen
voltages exist at the output
connectors when the
amplifier is turned on and
is passing a signal.
Figure A.4
Figure A.6
Wiring a Speaker to the Top
Speakon Connector for
Bridge-Mono Operation
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